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05-29-2016
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Dash and Tachissues
The dash, specifically the LCD, on my 90 is going haywire and sometimes off....also the Tach is off by 800-1000RPM. Alternator is producing 13.8 volts....battery is new.
Guess the wiring to the LCD is failing.
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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05-29-2016
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#2 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Dash and Tachissues
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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05-29-2016
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#3 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Dash and Tachissues
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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06-01-2016
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#4 | |
 
Join Date: Mar 2010
Location: Fort Myers, FL
Posts: 343
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Re: Dash and Tachissues
Quote:
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1992 #043, Aqua/Gray 40k miles |
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06-03-2016
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#5 |
  
Join Date: Jul 2005
Location: San Antonio, TX
Posts: 652
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Re: Dash and Tachissues
Lee,
I had a similar problem on my L98 years ago - Glenn B advised that it might be a bad cell in my battery - Which I recall was a new battery. Sure enough, I switched batteries after checking connections and taking apart the cluster to look for obvious problems.... whala! Can't explain it, but never had another problem for the following 10 or so years. Good luck, Mark
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Mark Horner President, ZR-1 Net Registry 91 ZR-1 #2016 95 ZR-1 #21 DRM-600, LPE 385 |
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06-05-2016
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#6 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,194
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Re: Dash and Tachissues
Both issues appear solved. The Tach is within 50rpm and no more dash issues....process was about 20 minutes to get it out; 1.5 hours of soldering, and I had to cut the plastic housing to get the Analog Calibration IC to fit. apprantly this is not needed on all housings
http://batee.com/corvette/dcrg/servi...c_adj_zr1.html http://batee.com/corvette/dcrg/9096_analog_ic/
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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05-29-2016
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#7 |
 
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,799
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Re: Dash and Tachissues
Tachometer Calibration TIPS
Use of Trim Pot for Tachometer Calibration TIPS Tachometer repair By the way Lee.....you can put all that in a single post by using Edit. Also.....if you ever want to bring a thread back to the top....just Edit your last post, Copy content, and then Delete the post. Then paste what you copied in New Post......back to the top the Thread goes 
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Left Clickable links  -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 05-29-2016 at 03:00 PM. |
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05-29-2016
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#8 |
 
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Dash and Tachissues
Lee,
If you need a hand calibrating your tach, PM me. Love to help. Paul.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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